Refrigeration range hood

Abstract

The refrigeration extractor hood comprises an oil smoke suction assembly and a refrigeration assembly, the oil smoke suction assembly comprises a first shell and a fan arranged in the first shell, and the first shell is provided with an air inlet capable of being opened and closed; the refrigerating assembly comprises a condenser, the condenser is located on the oil smoke flowing path and located on the downstream of the draught fan, the condenser comprises a main body capable of conducting heat and a refrigerant channel formed in the wall of the main body, and the main body is in a pipeline shape; the periphery of the main body is located in a heat dissipation channel with heat dissipation gas, and the heat dissipation channel is selectively communicated with a fan in the first shell.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a refrigeration range hood. Background Art

[0002] With the improvement of material living standards, people have higher and higher requirements for kitchen environment. People need to use stoves during cooking, which will generate a lot of heat in the kitchen, causing the temperature of the entire space to rise and the comfort of the environment to decrease. At present, most families use temporary fans to solve this problem. However, this method is not only inconvenient, but also occupies kitchen area.

[0003] For this purpose, a range hood with a refrigeration function has been disclosed in the prior art, which can blow out cold air from the housing of the range hood to cool down the kitchen. For example, a Chinese patent with application number 201810525673.7 discloses an air-conditioning range hood, in which the fume assembly of the air-conditioning range hood includes an oil fume channel; the air-conditioning assembly includes a condenser assembly, and the condenser assembly includes a condensation air inlet and a condensation air outlet, the condensation air outlet is connected to the oil fume channel, and the condensation air inlet is independent of the oil fume channel. However, the arrangement of this condenser uses the main fan for oil fume extraction to dissipate heat, which reduces the amount of oil fume sucked and exhausted, affecting the oil fume extraction effect.

[0004] There is also a kitchen air conditioner disclosed in a Chinese patent with application number 202110029969.1, which includes an air conditioning component and a range hood component. The air conditioning component includes a compressor, a condenser, a throttling element, and an evaporator. The range hood component includes an exhaust duct and a exhaust fan in the exhaust duct. The condenser is arranged around the outer wall of the exhaust duct.

[0005] This type of kitchen air conditioner can use oil smoke to dissipate heat from the condenser without the need for additional power. However, this setting requires that when the air conditioning component is working, the range hood component must also be started, that is, a portion of the cooling air generated by the air conditioner will be drawn out of the kitchen by the range hood component and discharged into the flue, causing energy waste and reducing the cooling effect in the kitchen. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a refrigeration range hood to reduce energy consumption and improve indoor environmental effects in view of the deficiencies in the above-mentioned prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a refrigeration range hood, comprising a fume suction assembly and a refrigeration assembly, wherein the fume suction assembly comprises a first shell and a fan arranged in the first shell, wherein the first shell is provided with an air inlet that can be opened and closed; the refrigeration assembly comprises a condenser, and the condenser is located downstream of the fan on the fume flow path, and is characterized in that:

[0008] The condenser comprises a heat-conducting main body and a refrigerant channel arranged inside a wall portion of the main body, wherein the main body is in a hollow pipe shape;

[0009] The outer periphery of the main body is located in a heat dissipation channel with heat dissipation gas, and the heat dissipation channel is selectively connected to the fan in the first shell.

[0010] By selectively connecting the heat dissipation channel of the condenser of the refrigeration component with the fan of the fume suction component, the refrigeration component can be started separately as needed without opening the air inlet of the fume suction component. Only the fan of the fume suction component is opened, so as to realize the circulation heat dissipation of the condenser and avoid the cold air generated by the refrigeration component being sucked in due to the opening of the air inlet, thereby ensuring that the cold air is used to lower the temperature of the indoor environment of the kitchen, and will not be sucked in by the fan and discharged into the flue, thereby reducing the energy consumption of the whole machine and achieving a better cooling effect. It is also possible to close the passage between the heat dissipation channel of the condenser and the fan as needed, and cool the condenser only by letting the oil smoke rise through the condenser.

[0011] Preferably, the condenser further comprises a shell arranged at intervals on the outer periphery of the main body, the cavity is a sandwich formed between the main body and the shell, and the sandwich is selectively connected to the fan in the first shell. By forming the sandwich, the contact area and contact time of the heat dissipating gas with the main body can be increased, thereby improving the heat dissipation efficiency.

[0012] Furthermore, in order to facilitate the selective connection between the interlayer and the first shell, the interlayer is connected to the first shell through a connecting pipe and thereby connected to the fluid in the first shell, and a valve is provided at the connection between the connecting pipe and the first shell to open or close the fluid passage between the connecting pipe and the first shell.

[0013] Preferably, the valve is rotatably connected to the connecting pipe, and the refrigerating range hood further comprises a motion mechanism for driving the valve to rotate.

[0014] Further, the movement mechanism includes a driving mechanism and a transmission mechanism, the transmission mechanism includes a screw driven by the driving mechanism to move in a direction perpendicular to the rotation axis of the valve, the screw can be in an extended state and a retracted state, in the extended state, the screw lifts the valve to close the fluid passage between the connecting pipe and the first shell, in the retracted state, the screw releases the valve, the valve extends longitudinally under the action of gravity to open the fluid passage between the connecting pipe and the first shell. By driving the screw to move linearly through the driving mechanism, the passage between the heat dissipation channel of the condenser and the fan can be conveniently closed or opened when needed.

[0015] Furthermore, the transmission mechanism also includes gears, gear nuts and screws. The driving mechanism is a motor that drives the gears to rotate. The rotation axes of the gears and gear nuts are consistent with the moving direction of the screw. The gear nuts are meshed with the gears, and the gear nuts are threadedly connected to the screw. By setting the gears and gear nuts, the output of the motor can be converted into linear motion to drive the screw.

[0016] Furthermore, in order to facilitate limiting the movement trajectory of the screw and the position of the gear nut, the movement mechanism also includes a mounting fixing seat, which has at least two mounting fixing seats and corresponds to the gear nuts and the screw respectively. The mounting fixing seats are fixedly arranged in the first shell, and the gear nut and the screw respectively pass through the corresponding mounting fixing seats to flexibly cooperate with the first shell.

[0017] Furthermore, the oil fume suction assembly also includes a smoke baffle plate which is arranged on the first shell and flips to open and close the air inlet.

[0018] Furthermore, the transmission mechanism also includes a connecting rod assembly, and the driving mechanism and the smoke shield are connected by transmission via the connecting rod assembly, thereby simplifying the structure of the motion mechanism.

[0019] Preferably, in order to ensure a shorter refrigerant heat transfer path, the main body includes two layers of heat conducting plates, and the refrigerant channel is formed between the two layers of heat conducting plates.

[0020] Furthermore, the refrigeration assembly is arranged on the oil fume suction assembly; the refrigeration assembly further comprises a second shell, a compressor and an evaporator, the compressor, the evaporator and the condenser are arranged in the second shell, and the second shell is arranged on the first shell. Thus, the refrigeration assembly can be conveniently installed, and the space occupied on both sides of the oil fume suction assembly can also be reduced.

[0021] Preferably, a partition is provided in the second shell, thereby dividing the second shell into a first chamber and a second chamber, and the two chambers are isolated from each other. The evaporator is arranged in the first chamber, and the compressor and condenser are arranged in the second chamber, thereby isolating the hot and cold parts of the refrigeration assembly to avoid mutual interference and improve the refrigeration effect.

[0022] Compared with the prior art, the advantages of the present invention are: by selectively connecting the heat dissipation channel of the condenser of the refrigeration component with the fan of the fume suction component, the refrigeration component can be started separately as needed, without opening the air inlet of the fume suction component. Only the fan of the fume suction component is opened, so as to realize the circulation heat dissipation of the condenser and avoid the cold air generated by the refrigeration component being sucked in due to the opening of the air inlet, thereby ensuring that the cold air is used to lower the temperature of the indoor environment of the kitchen, and will not be sucked in by the fan and discharged into the flue, thereby reducing the energy consumption of the whole machine and achieving a better cooling effect; the passage between the heat dissipation channel of the condenser and the fan can also be closed as needed, and the condenser can be cooled only by the rising of oil smoke through the condenser. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a range hood in a closed state according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a range hood according to an embodiment of the present invention in which the first housing and the second housing are hidden in a closed state;

[0025] Figure 3 is a schematic diagram of the exploded structure of a range hood according to an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of a refrigeration assembly of a range hood according to an embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of a condenser, a connecting pipe and a valve plate of a refrigeration assembly of a range hood according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the exploded structure of the condenser, the connecting pipe and the valve plate of the refrigeration assembly of the range hood according to the embodiment of the present invention;

[0029] Figure 7 It is a cross-sectional view of a condenser, a connecting pipe and a valve plate of a refrigeration assembly of a range hood according to an embodiment of the present invention;

[0030] Figure 8 for Figure 7 A partial enlarged schematic diagram of Ⅰ;

[0031] Fig. 9 It is a schematic diagram of the open state of part of the connecting pipes, valve plate and movement mechanism of the range hood according to the embodiment of the present invention;

[0032] Fig.10 is a schematic diagram of the exploded structure of the motion mechanism of the range hood according to an embodiment of the present invention;

[0033] Fig.11 is a schematic diagram of an open state of a range hood according to an embodiment of the present invention;

[0034] Fig.12 It is a cross-sectional view of a part of the connecting pipes, valve plate and movement mechanism of the range hood in a closed state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] See also Figures 1 to 8 A refrigeration range hood includes a range hood assembly and a refrigeration assembly, wherein the range hood assembly includes a first shell 11 and a fan 12 disposed in the first shell 11. In this embodiment, the range hood assembly is in the form of a commonly used side-suction range hood. Optionally, it can be any form of existing top suction, low suction, ceiling type, etc. The first shell 11 can be a combination of one or more shells.

[0038] In this embodiment, the front side of the first housing 11 forms an air inlet 111, and a smoke baffle 14 is provided at the air inlet 111 to flip open and close the air inlet 111. The opening mode of the smoke baffle 14 can also be replaced by a composite motion of translation or rotation combined with translation in the art.

[0039] The oil fume suction component and the refrigeration component constitute independent modules respectively. When installed, the refrigeration component is mounted on the oil fume suction component, so that the refrigeration component does not occupy the left and right sides of the first shell 11 of the oil fume suction component, which can avoid the fan frame (part of the first shell 11) used to set the fan 12 from being offset and affecting its own oil fume suction effect. Moreover, the two modules are installed independently, which can meet the needs of both new decoration users and old users who are changing their decoration.

[0040] The refrigeration assembly includes a second shell 21, a compressor 22, an evaporator 23, a condenser 24 and a cooling fan 25, wherein the second shell 21 is arranged on the first shell 11, the compressor 22, the evaporator 23, the condenser 24 and the cooling fan 25 can be arranged in the second shell 21, and a refrigerant passage is formed between the compressor 22, the evaporator 23 and the condenser 24. The working principle of the refrigeration assembly is the same as the prior art.

[0041] A cold air outlet 211 is provided on the front side of the second housing 21, such as near the top. The evaporator 23 and its corresponding cooling fan 25 can be arranged near the cold air outlet 211. The cold air after heat exchange in the evaporator 23 is blown out from the cold air outlet 211 into the kitchen through the cooling fan 25 to provide a comfortable cooking environment temperature for the user. Air inlets 212 are provided on other sides of the second housing 21, such as the left and right sides, to replenish air (room temperature air) into the second housing 21.

[0042] The second housing 21 is provided with a partition 26, thereby dividing the second housing 21 into a first chamber 213 and a second chamber 214, and the two chambers are isolated from each other. The first chamber 213 is a cold chamber, and the evaporator 23 and its corresponding cooling fan 25 are arranged in the first chamber 213, and the second chamber 214 is a hot chamber, and the compressor 22 and the condenser 24 are arranged in the second chamber 214.

[0043] The condenser 24 includes a main body 241 and a refrigerant channel 242. The main body 241 is in the shape of a hollow pipe, which can be a cylindrical or rectangular parallelepiped shape. The refrigerant channel 242 is formed inside the wall of the main body 241, and the refrigerant channel 242 can be spirally coiled. The wall of the main body 241 includes two layers of heat conducting plates 2411. The refrigerant channel 242 is formed between the two layers of heat conducting plates 2411. The two layers of heat conducting plates 2411 have a gap only at the position where the refrigerant channel 242 is formed, and the other parts are all fitted (the gaps in the parts outside the refrigerant channel 242 caused by processing problems, such as bubbles, should be regarded as a situation without gaps). Optionally, the heat conducting plate 2411 is a metal plate, such as an aluminum plate, and two aluminum plates are hot-rolled and pressed, and the space between the two aluminum plates is inflated to form the above-mentioned refrigerant channel 242, and then the whole is rolled into a desired shape. After hot rolling, the refrigerant in the refrigerant channel 242 can withstand a pressure of up to 2.3 MPa, and there is zero gap contact between the refrigerant and the heat-conducting material, and the heat exchange efficiency is extremely high, so the surface temperature of the condenser under natural conditions is not higher than 50° C. However, in the fin type commonly used in existing air conditioners or the winding type described in the background technology, the refrigerant and the heat-conducting material cannot be completely matched without gaps, so the heat transfer is not smooth, resulting in a high temperature of the condenser itself, which in turn affects the overall cooling effect of the refrigeration component.

[0045] On the oil fume flow path, the condenser 24 is arranged downstream of the fan 12. It can be directly connected to the air outlet of the fan 12, or connected to the fan 12 through the air outlet cover 13, or connected to the smoke exhaust duct (not shown) as a part of the smoke exhaust duct. That is, the space surrounded by the heat conducting plate 2411 of the inner layer of the main body 241 constitutes a smoke exhaust channel 2412 through which the oil fume exhausted by the fan 12 passes before reaching the public flue or being discharged into the room. The inner wall surface of the inner heat conducting plate 2411 and the outer wall surface of the outer heat conducting plate 2411 both constitute heat dissipation surfaces. The inner heat dissipation surface dissipates heat through the oil fume passing through the smoke exhaust channel 2412, and the outer heat dissipation surface contacts the room temperature air entering the second shell 21 from the kitchen indoor environment during operation, and can also achieve a certain degree of heat dissipation. The room temperature air constitutes a heat dissipation fluid.

[0046] In order to further improve the heat exchange efficiency, a hollow shell 243 can be provided outside the main body 241 of the condenser 24, which is adapted to the shape of the main body 241 and is larger than the main body 241, so that it can be arranged at intervals on the outer periphery of the main body 241 to form an interlayer 244 between the shell 243 and the outer wall of the main body 241. In this embodiment, the main body 241 is in the shape of a hollow pipe, which is arranged longitudinally, especially vertically.

[0047] The interlayer 244 can be in fluid communication with the fan 12 in the first housing 11 through the connecting pipe 27, and the interlayer 244 can be in fluid communication with the external air at the upper end (or other positions). Thus, through the operation of the fan 12, a negative pressure can be formed through the connecting pipe 27, and the external air is sucked into the interlayer 244 and enters the first housing 11 through the connecting pipe 27, and is discharged through the fan 12. Alternatively, the fan 12 can also be directly in fluid communication with the cavity in the second housing 21 where the condenser 24 is located (the cavity is in fluid communication with the indoor environment of the kitchen). Both the interlayer 244 and the cavity in the second housing 21 are heat dissipation channels with heat dissipation gas, and the heat dissipation gas can be replenished from the indoor environment of the kitchen.

[0048] The lower end of the connecting pipe 27 extends to the top of the first housing 11, and an opening 112 is formed on the top of the first housing 11 at a position corresponding to the lower end of the connecting pipe 27, so that the lower end of the connecting pipe 27 is in fluid communication with the first housing 11. The lower end of the connecting pipe 27 is open, and a valve 28 is provided at the open end, and the valve 28 can open or close the fluid passage between the connecting pipe 27 and the fan 12 in the first housing 11.

[0049] In this embodiment, the valve 28 is rotatably connected to the lower end of the connecting pipe 27, and its rotation axis extends in the front-to-back direction. The connection point between the valve 28 and the connecting pipe 27 is preferably the side of the connecting pipe 27 away from the fan 12 (i.e. Figure 2The side close to the left side of the first housing 11 is shown in the figure, and the left side refers to the side located on the left side of the user from the user's perspective when the range hood is in use). The connection position of the valve 28 and the connecting pipe 27 is located inside the connecting pipe 27.

[0050] In order to facilitate the driving of the valve 28 to rotate, the refrigeration range hood further includes a motion mechanism, which includes a driving mechanism 31 and a transmission mechanism, wherein the transmission mechanism includes a gear 321, a gear nut 322, a screw 323 and a mounting and fixing seat 324, the rotation axes of the gear 321 and the gear nut 322 are both extended in the left and right directions, the moving direction of the screw 323 is consistent with the rotation axes of the gear 321 and the gear nut 322, and is perpendicular to the rotation axis of the valve 28. The driving mechanism 31 is preferably a motor, which can drive the gear 321 to rotate, and the gear nut 322 is threadedly connected with the screw 323. The mounting and fixing seats 324 have at least two, which correspond to the gear nut 322 and the screw 323, respectively, and are fixedly arranged in the first housing 11, and the gear nut 322 and the screw 323 respectively pass through the corresponding mounting and fixing seats 324 to flexibly cooperate with the first housing 11. The gear end of the gear nut 322 is meshed with the gear 321 to realize transmission. The end of the screw rod 323 away from the gear nut 322 abuts against the valve 28 .

[0051] The transmission mechanism may further include a connecting rod assembly 325, which connects the driving mechanism 31 and the smoke baffle 14, so that the driving mechanism 31 can also drive the smoke baffle 14 to flip. The smoke baffle 14 and the valve 28 share the same driving mechanism 31, simplifying the structure of the motion mechanism. The connecting rod assembly 325 may also be replaced by other transmission structures in the prior art, as long as the driving mechanism 31 drives the smoke baffle 14 to flip, such as a rocker, a crank, etc. Alternatively, the smoke baffle 14 and the valve 28 may also be driven by independent mechanisms.

[0052] Through the setting of the above motion mechanism, the following working modes can be realized:

[0053] When preparing food, turn on the refrigeration button of the refrigeration assembly, the compressor 22 of the refrigeration assembly starts working, the fan 12 of the fume extraction assembly rotates, but the driving mechanism 31 does not start, the smoke baffle 14 is in a state of closing the air inlet 111, the screw 323 is in a retracted state, the valve 28 is released without applying force to the valve 28, and the valve 28 is in a state of extending longitudinally downward from the connection with the connecting pipe 27 under the action of gravity, thereby opening the connecting pipe 27 and communicating with the fan 12 fluid, see Figure 1 and Fig. 9 .

[0054] At this time, the heat dissipation path of the condenser 24 is that the air flow in the second shell 21 enters the interlayer 244 of the condenser 24, and the flowing airflow cools and dissipates the outer wall surface of the condenser 24; then enters the first shell 11 through the connecting pipe 27, and is discharged under the action of the fan 12. The discharged airflow enters the condenser 24, and cools and dissipates the inner wall surface of the condenser 24. In this way, the purpose of cooling and dissipating heat is achieved through the circulating airflow in the condenser 24 when preparing food, and the cold air generated by the evaporator 23 will not be sucked into the fan 12.

[0055] When cooking, the oil fume absorbing function of the oil fume absorbing assembly is started, the refrigeration assembly continues to work, the driving mechanism 31 is started, the smoke baffle 14 is opened, and the gear 321 rotates in one direction, such as counterclockwise, driving the gear nut 322 to rotate clockwise. At this time, the screw rod 323 is translated in a direction away from the left side of the first shell 11 under the action of the gear nut 322, pushing the valve 28 to rotate until the lower end of the connecting pipe 27 is closed. Fig.11 and Fig.12 At this time, the outer wall surface of the condenser 24 no longer uses air flow to dissipate heat.

[0056] After cooking is finished, the oil fume absorbing assembly is closed, and the driving mechanism 31 is started to close the smoke baffle 14. At the same time, the gear 321 rotates clockwise, driving the gear nut 322 to rotate counterclockwise. At this time, the screw rod 323 moves in a direction close to the left side of the first shell 11 under the action of the gear nut 322. When it returns to the initial position, it no longer applies force to the valve 28. The valve 28 is again extended longitudinally downward under the action of gravity, and the connecting pipe 27 is opened. Fig. 9 .

[0057] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A refrigeration range hood, comprising a range hood assembly and a refrigeration assembly, wherein the range hood assembly comprises a first shell (11) and a fan (12) arranged in the first shell (11), wherein the first shell (11) is provided with an air inlet (111) that can be opened and closed; the refrigeration assembly comprises a condenser (24), wherein the condenser (24) is located downstream of the fan (12) on a flow path of the range hood, and wherein: The condenser (24) comprises a main body (241) capable of conducting heat and a refrigerant channel (242) arranged inside a wall portion of the main body (241); the main body (241) is in the shape of a pipe; The outer periphery of the main body (241) is located in a heat dissipation channel containing heat dissipation gas, and the heat dissipation channel is selectively connected to the fan (12) in the first shell (11).

2. The refrigeration range hood according to claim 1, characterized in that: The condenser (24) further comprises an outer shell (243) arranged at intervals on the outer periphery of the main body (241); the heat dissipation channel is an interlayer (244) formed between the main body (241) and the outer shell (243); the interlayer (244) is selectively connected to the fan (12) in the first shell (11).

3. The refrigeration range hood according to claim 2, characterized in that: The interlayer (244) is connected to the first shell (11) via a connecting pipe (27) and is thereby in fluid communication with the first shell (11). A valve (28) is provided at the connection between the connecting pipe (27) and the first shell (11) to open or close the fluid passage between the connecting pipe (27) and the first shell (11).

4. The refrigeration range hood according to claim 3, characterized in that: The valve (28) is rotatably connected to the connecting pipe (27), and the refrigerating range hood further comprises a motion mechanism for driving the valve (28) to rotate.

5. The refrigeration range hood according to claim 4, characterized in that: The motion mechanism comprises a driving mechanism (31) and a transmission mechanism, wherein the transmission mechanism comprises a screw rod (323) driven by the driving mechanism (31) to move in a direction perpendicular to the rotation axis of the valve (28), wherein the screw rod (323) can be in an extended state and a retracted state, wherein in the extended state, the screw rod (323) lifts up the valve (28) and closes the fluid passage between the connecting pipe (27) and the first shell (11), and in the retracted state, the screw rod (323) releases the valve (28), and the valve (28) extends longitudinally under the action of gravity and opens the fluid passage between the connecting pipe (27) and the first shell (11).

6. The refrigeration range hood according to claim 5, characterized in that: The transmission mechanism further comprises a gear (321), a gear nut (322) and a screw (323); the driving mechanism (31) is a motor for driving the gear (321) to rotate; the rotation axes of the gear (321) and the gear nut (322) are consistent with the moving direction of the screw (323); the gear nut (322) and the gear (321) are meshed; and the gear nut (322) is threadedly connected to the screw (323).

7. The refrigeration range hood according to claim 6, characterized in that: The motion mechanism further comprises a mounting fixing seat (324), the mounting fixing seat (324) having at least two gear nuts (322) and screw rods (323) respectively corresponding to each other, the mounting fixing seat (324) being fixedly arranged in the first housing (11), the gear nuts (322) and screw rods (323) respectively passing through corresponding mounting fixing seats (324) so ​​as to be dynamically matched with the first housing (11).

8. The refrigeration range hood according to claim 5, characterized in that: The oil fume suction assembly further comprises a smoke baffle (14) which is arranged on the first shell (11) and is used to flip open and close the air inlet (111).

9. The refrigeration range hood according to claim 8, characterized in that: The transmission mechanism further comprises a connecting rod assembly (325), and the driving mechanism (31) and the smoke baffle (14) are transmission-connected via the connecting rod assembly (325).

10. The refrigeration range hood according to any one of claims 1 to 9, characterized in that: The wall portion of the main body (241) includes two layers of heat-conducting plates (2411), and the refrigerant channel (242) is formed between the two layers of heat-conducting plates (2411).

11. The refrigeration range hood according to claim 1, characterized in that: The refrigeration component is arranged on the oil fume suction component; the refrigeration component also includes a second shell (21), a compressor (22) and an evaporator (23); the compressor (22), the evaporator (23) and the condenser (24) are arranged in the second shell (21); and the second shell (21) is arranged on the first shell (11).

12. The refrigeration range hood according to claim 11, characterized in that: A partition (26) is arranged in the second shell (21), thereby dividing the second shell (21) into a first chamber (213) and a second chamber (214), the two chambers being isolated from each other, the evaporator (23) being arranged in the first chamber (213), and the compressor (22) and the condenser (24) being arranged in the second chamber (214).

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